Electronic cigarette maker Juul Labs has plans to convert Canada’s five million adult smokers to loyal vapers amid a storm of controversy in the U.S. for its addictive qualities and youth appeal that’s leaving a sour taste among health workers and youth groups in Canada. The San Francisco-based company said its expansion follows Canadian law Bill S-5, which legalized the sale of vaping products to those 19 years and older in Canada as of May this year. [...]